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<title>call (Rack::ETag)</title>
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<pre><span class="ruby-comment cmt"># File lib/sinatra/rack_etag.rb, line 40</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">body</span> = <span class="ruby-ivar">@app</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">etag_status?</span>(<span class="ruby-identifier">status</span>) <span class="ruby-operator">&&</span> <span class="ruby-identifier">etag_body?</span>(<span class="ruby-identifier">body</span>) <span class="ruby-operator">&&</span> <span class="ruby-operator">!</span><span class="ruby-identifier">http_caching?</span>(<span class="ruby-identifier">headers</span>)
<span class="ruby-identifier">digest</span>, <span class="ruby-identifier">body</span> = <span class="ruby-identifier">digest_body</span>(<span class="ruby-identifier">body</span>)
<span class="ruby-identifier">headers</span>[<span class="ruby-value str">'ETag'</span>] = <span class="ruby-node">%("#{digest}")</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">digest</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-keyword kw">not</span> <span class="ruby-identifier">headers</span>[<span class="ruby-value str">'Cache-Control'</span>] <span class="ruby-keyword kw">and</span> <span class="ruby-identifier">digest</span>
<span class="ruby-identifier">headers</span>[<span class="ruby-value str">'Cache-Control'</span>] = <span class="ruby-identifier">digest</span> <span class="ruby-value">? </span><span class="ruby-ivar">@cache_control</span> <span class="ruby-operator">:</span> <span class="ruby-ivar">@no_cache_control</span>
<span class="ruby-keyword kw">end</span>
[<span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">body</span>]
<span class="ruby-keyword kw">end</span></pre>
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